WO2022016609A1

WO2022016609A1 - Product preparation process

Info

Publication number: WO2022016609A1
Application number: PCT/CN2020/106765
Authority: WO
Inventors: 李扬德
Original assignee: 东莞颠覆产品设计有限公司
Priority date: 2020-07-22
Filing date: 2020-08-04
Publication date: 2022-01-27
Also published as: CN111822676A

Abstract

A product preparation process, which is used to solve the existing technical problem of processing being extremely difficult when hard metals or hard alloys are used to produce products with high hardness. The method comprises: placing a hard metal rod or a hard alloy rod and an amorphous alloy rod in a preset cavity for mixing; heating the mixed material to the temperature range of a supercooled liquid phase zone of the amorphous alloy rod; making the amorphous alloy rod flow in a semi-solid state by means of applying pressure, and driving the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform together into the shape of the preset cavity; cooling the mixed material to obtain a composite material; placing the composite material into a product mold; injecting a liquid metal material into the mold, such that the liquid metal material is mixed with the composite material; applying a preset pressure to the mold and maintaining the pressure for a preset time, and then opening the mold to remove the product.

Description

A product preparation process

This application claims the priority of the Chinese patent application with the application number 202010710281.5 and the invention titled "a product preparation process" filed with the China Patent Office on July 22, 2020, the entire contents of which are incorporated into this application by reference.

technical field

The invention relates to the technical field of manufacturing processes, in particular to a product preparation process.

Background technique

Due to the high hardness and high melting point of hard metals and hard alloys, the finished products are generally in the form of rods and filaments. The products are generally produced by powder metallurgy. The processes include powder milling, pressing and sintering. The above-mentioned production methods are complicated, and due to the high melting point of hard metals or hard alloys, the above methods are difficult to convert hard metals or hard alloys. The alloy is processed into a product with a more complex structure, and the hard metal or hard alloy has high brittleness, and it is easy to cause edge chipping during CNC machining. The product feasibility of machining alloys into complex shapes is also relatively low.

Therefore, in order to solve the above-mentioned technical problems, finding a product preparation process has become an important subject studied by those skilled in the art.

SUMMARY OF THE INVENTION

The embodiment of the present invention discloses a product preparation process, which is used to solve the technical problem of extremely difficult processing when hard metal or hard alloy is used to produce a product with relatively high hardness.

The embodiment of the present invention provides a product preparation process, comprising:

S1. Place the hard metal rod or hard alloy rod and the amorphous alloy rod in a preset cavity for mixing to form a mixed material;

S2, heating the above-mentioned mixed material, and heating to the temperature range of the supercooled liquid phase region of the amorphous alloy rod;

S3, make the amorphous alloy rod flow in a semi-solid state by applying pressure, and drive the hard metal rod or hard alloy rod mixed with it to deform to the shape of the preset cavity together;

S4, cooling the above mixed material to obtain a composite material;

S5, placing the composite material in the product mold;

S6, injecting the liquid metal material into the mold, so that the liquid metal material is mixed with the composite material;

S7, applying a preset pressure to the mold and maintaining the pressure for a preset time, then opening the mold, and taking out the product.

Optionally, the metal material is one of copper, copper alloy, titanium, titanium alloy, amorphous alloy, aluminum, aluminum alloy, zinc, and zinc alloy.

Optionally, in the step S6, the temperature at which the metal material is injected is lower than the glass transition temperature of the amorphous alloy in the composite material.

Optionally, in the step S2, the heating temperature range of the above-mentioned mixed material is 200°C to 600°C.

Optionally, the diameter of the hard metal rod is in the range of 0.1 mm to 10 mm, the diameter of the hard metal rod is in the range of 0.1 mm to 10 mm, and the diameter of the amorphous alloy rod is in the range of 0.1 mm to 10 mm;

Optionally, the diameter ratio of the hard metal rod or the cemented carbide rod to the amorphous alloy rod is in the range of 1:1 to 15:1; the hard metal rod or the cemented carbide rod The volume ratio to the amorphous alloy rod ranges from 1:1 to 10:1.

Optionally, the density of the hard metal rod and the cemented carbide rod is greater than 8 g/cm ³ and the hardness is greater than 500HV.

Optionally, the hard metal rod includes one of tungsten, molybdenum, tantalum, nickel, cobalt, and niobium;

The cemented carbide rod includes one of tungsten carbide, titanium carbide, tantalum carbide, and niobium carbide;

The amorphous alloy rod includes one of rare earth-based amorphous alloy, copper-based amorphous alloy, zirconium-based amorphous alloy, titanium-based amorphous alloy, nickel-based amorphous alloy, and cobalt-based amorphous alloy.

Optionally, the step S3 specifically includes:

By applying pressure, the amorphous alloy rod is made to flow in a semi-solid state, and the hard metal rod or hard alloy rod mixed with it is deformed to the shape of the preset cavity together, which has a negative impact on the mixed material in the cavity. Ultrasonic vibration is applied to the forming part, and the frequency range of the ultrasonic wave is 10kHz to 100kHz. When the diameter of the amorphous alloy rod, hard metal rod or cemented carbide rod is 0.1mm to 5mm, the ultrasonic wave with a frequency range of 40kHz to 100kHz is used. For amorphous alloy rods, hard metal rods or carbide rods with diameters between 5mm and 10mm, use ultrasonic waves in the frequency range of 10kHz to 50kHz.

Optionally, the step S3 specifically includes:

The amorphous alloy rod is made to flow in a semi-solid state by applying pressure in sections, and the hard metal rod or hard alloy rod mixed with it is deformed to the shape of the preset cavity together;

The first stage of pressure is the force F1 that enables the amorphous alloy rod to flow in the superplastic state, the time of applying the pressure is T1, and the second stage of pressure is the force F2 applied after the superplastic state of the amorphous alloy ends. The time is T2, where F2>1.2×F1, T2>0.3×T1.

As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

The embodiment of the present invention provides a product preparation process, including S1, mixing hard metal rods or hard alloy rods and amorphous alloy rods in a preset cavity to form a mixed material; S2, mixing the above The material is heated and heated to the temperature range of the supercooled liquid phase region of the amorphous alloy rod; S3, the amorphous alloy rod is made to flow in a semi-solid state by applying pressure to drive the hard metal rod mixed with it. Or the cemented carbide rods are deformed together to the shape of the preset cavity; S4, the above mixed material is cooled to obtain a composite material; S5, the composite material is placed in the product mold; S6, the liquid metal material is injected into the mold. In the mold, the liquid metal material is mixed with the composite material; S7, a preset pressure is applied to the mold and maintained for a preset time, and then the mold is opened to take out the product. In this embodiment, the amorphous alloy rod is used as a binder, and the superplastic deformation characteristic of the amorphous alloy rod is used to form at low temperature and low pressure, so that the hard metal or hard alloy is formed without heating to above its melting point. It is only necessary to make the amorphous alloy rod flow in a semi-solid state by applying pressure to drive the hard metal rod or hard alloy rod mixed with it to deform to the shape of the preset cavity, and then cool the above mixed material. A composite material with a relatively complex structure and high hardness can be obtained, and then the obtained composite material is placed in the mold of the product, the liquid metal material is injected into the mold, and a preset pressure is applied to the mold and maintained for a preset time. The product can be obtained by opening the mold. The product obtained by the above process has stronger hardness because of the existence of hard metal or hard metal, and the above process is relatively simple, and there is no need to heat the hard metal or hard metal. To its melting point, there is no need to use extremely complex powder metallurgy methods for production, which greatly improves the production efficiency of high-hardness and high-strength products.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic flowchart of a product preparation process provided in an embodiment of the present invention.

detailed description

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to Figure 1, a product preparation process provided in this embodiment includes:

S3. Make the amorphous alloy rod flow in a semi-solid state by applying pressure, and drive the hard metal rod or hard alloy rod mixed with it to deform together to the shape of the preset cavity;

S4, cooling the above mixed material to obtain a composite material;

S5, placing the composite material in the product mold;

S7, applying a preset pressure to the mold and maintaining the pressure for a preset time, then opening the mold, and taking out the product. The pressure applied in this step can be provided by an external mechanical device. The external mechanical device can be assembled by a driving device and a pressing block connected to the driving device. The devices for providing pressure are in the prior art, and there are many kinds. Explain in detail.

It should be noted that the products in this embodiment are high-hardness and high-strength products, such as bullets, warheads, and the like. In addition, the method of applying pressure in this embodiment can be implemented by using an external pressure device (such as a structure in which a cylinder cooperates with a pressure plate), and this embodiment does not limit the method of applying pressure.

In this embodiment, the amorphous alloy rod is used as a binder, and the superplastic deformation characteristic of the amorphous alloy rod is used to form at low temperature and low pressure, so that the hard metal or hard alloy is formed without heating to above its melting point. It is only necessary to make the amorphous alloy rod flow in a semi-solid state by applying pressure to drive the hard metal rod or hard alloy rod mixed with it to deform to the shape of the preset cavity, and then cool the above mixed material. A composite material with a relatively complex structure and high hardness can be obtained, and then the obtained composite material is placed in the mold of the product, the liquid metal material is injected into the mold, and a preset pressure is applied to the mold and maintained for a preset time. The product can be obtained by opening the mold. The product obtained by the above process has stronger hardness because of the existence of hard metal or hard metal, and the above process is relatively simple, and there is no need to heat the hard metal or hard metal. To its melting point, there is no need to use extremely complex powder metallurgy methods for production, which greatly improves the production efficiency of high-hardness and high-strength products.

Further, the metal material is one of copper, copper alloy, titanium, titanium alloy, amorphous alloy, aluminum, aluminum alloy, zinc, and zinc alloy.

Further, in the step S6, the temperature when the metal material is injected is lower than the glass transition temperature of the amorphous alloy in the composite material.

It should be noted that, through the above design, the amorphous alloy in the composite material can be prevented from appearing in a semi-solid or liquid state.

Further, the injection of the liquid metal into the mold may be performed by die casting or casting, and this embodiment does not limit the injection method of the metal.

Further, in the step S2, the heating temperature range of the above-mentioned mixed material is 200°C to 600°C.

It should be noted that, within the above-mentioned heating temperature range and the temperature range of the supercooled liquid phase region of the amorphous alloy rod, when the above-mentioned mixed material is heated to the above-mentioned 200°C to 600°C, the amorphous alloy rod becomes a semi-solid state. .

Further, the diameter of the hard metal rod is in the range of 0.1 mm to 10 mm, the diameter of the hard metal rod is in the range of 0.1 mm to 10 mm, and the diameter of the amorphous alloy rod is in the range of 0.1 mm to 10 mm;

Further, the diameter ratio of the hard metal rod or the cemented carbide rod and the amorphous alloy rod ranges from 1:1 to 15:1; the hard metal rod or the cemented carbide rod and the The volume ratio of the amorphous alloy rods ranges from 1:1 to 10:1.

Further, the density of the hard metal rod and the hard alloy rod is greater than 8g/cm ³ and the hardness is greater than 500HV.

Further, the hard metal rod includes one of tungsten, molybdenum, tantalum, nickel, cobalt, and niobium;

It should be noted that, in addition to the above-mentioned metals, the hard metal bars in this embodiment may also include other hard metals, which are not limited in this embodiment. Similarly, in this embodiment, the The cemented carbide rod may also include other cemented carbide, which is not limited in this embodiment. The amorphous alloy rod in this embodiment may also include other amorphous alloys, which is not limited in this embodiment.

Further, the step S3 specifically includes:

It should be noted that when it is necessary to explain, in the process of heating and pressurizing the mixed material, ultrasonic vibration can be applied to part of the formed mixed material to increase the fluidity of the semi-solid amorphous alloy rod, improve the amorphous alloy and the hardness. The contact area of the metal or hard alloy improves the bonding strength of the two, and improves the uniformity of the distribution of hard metal or hard alloy in the amorphous alloy.

Further, the step S3 specifically includes:

It should be noted that, by adopting the above-mentioned method of subsection pressing, the gap between the hard metal or hard alloy and the amorphous alloy can be eliminated, the bonding strength can be improved, and the density of the product can be improved. The first stage pressure F1 is the force that enables the amorphous alloy to flow in the superplastic state, and the second stage pressure F2 is the pressure that increases the density of the composite material after the superplastic state ends.

A product preparation process provided by the present invention has been introduced in detail above. For those of ordinary skill in the art, according to the ideas of the embodiments of the present invention, there will be changes in the specific implementation and application scope. In summary, the above However, the contents of this specification should not be construed as limiting the present invention.

Claims

A product preparation process, characterized in that, comprising:

S1. Place the hard metal rod or hard alloy rod and the amorphous alloy rod in a preset cavity for mixing to form a mixed material;

S2, heating the above-mentioned mixed material, and heating to the temperature range of the supercooled liquid phase region of the amorphous alloy rod;

S3. Make the amorphous alloy rod flow in a semi-solid state by applying pressure, and drive the hard metal rod or hard alloy rod mixed with it to deform together to the shape of the preset cavity;

S4, cooling the above mixed material to obtain a composite material;

S5, placing the composite material in the product mold;

S6, injecting the liquid metal material into the mold, so that the liquid metal material is mixed with the composite material;

S7, applying a preset pressure to the mold and maintaining the pressure for a preset time, then opening the mold, and taking out the product.
The product preparation process according to claim 1, wherein the metal material is one of copper, copper alloy, titanium, titanium alloy, amorphous alloy, aluminum, aluminum alloy, zinc, and zinc alloy.
The product preparation process according to claim 1, characterized in that, in the step S6, the temperature when the metal material is injected is lower than the glass transition temperature of the amorphous alloy in the composite material.
The product preparation process according to claim 1, characterized in that, in the step S2, the heating temperature range of the above-mentioned mixed material is 200°C to 600°C.
The product preparation process according to claim 1, wherein the diameter of the hard metal rod is in the range of 0.1 mm to 10 mm, the diameter of the hard alloy rod is in the range of 0.1 mm to 10 mm, and the amorphous alloy is in the range of 0.1 mm to 10 mm. The diameter of the rods ranged from 0.1 mm to 10 mm.
The product preparation process according to claim 5, wherein the diameter ratio of the hard metal rod or the hard alloy rod and the amorphous alloy rod ranges from 1:1 to 15:1; the The volume ratio of the cemented carbide rod or the cemented carbide rod to the amorphous alloy rod is in the range of 1:1 to 10:1.
The product preparation process according to claim 1, wherein the density of the hard metal rod and the hard alloy rod is greater than 8g/cm 3 and the hardness is greater than 500HV.
The product preparation process according to claim 1, wherein the hard metal rod comprises one of tungsten, molybdenum, tantalum, nickel, cobalt, and niobium;

The cemented carbide rod includes one of tungsten carbide, titanium carbide, tantalum carbide, and niobium carbide;

The amorphous alloy rod includes one of rare earth-based amorphous alloy, copper-based amorphous alloy, zirconium-based amorphous alloy, titanium-based amorphous alloy, nickel-based amorphous alloy, and cobalt-based amorphous alloy.
The product preparation process according to claim 1, wherein the step S3 specifically includes:

By applying pressure, the amorphous alloy rod is made to flow in a semi-solid state, and the hard metal rod or hard alloy rod mixed with it is deformed to the shape of the preset cavity together, which has a negative impact on the mixed material in the cavity. Ultrasonic vibration is applied to the forming part, and the frequency range of the ultrasonic wave is 10kHz to 100kHz. When the diameter of the amorphous alloy rod, hard metal rod or cemented carbide rod is 0.1mm to 5mm, the ultrasonic wave with a frequency range of 40kHz to 100kHz is used. For amorphous alloy rods, hard metal rods or carbide rods with diameters between 5mm and 10mm, use ultrasonic waves in the frequency range of 10kHz to 50kHz.
The product preparation process according to claim 1, wherein the step S3 specifically comprises:

The amorphous alloy rod is made to flow in a semi-solid state by applying pressure in sections, and the hard metal rod or hard alloy rod mixed with it is deformed to the shape of the preset cavity together;

The first stage of pressure is the force F1 that enables the amorphous alloy rod to flow in the superplastic state, the time of applying the pressure is T1, and the second stage of pressure is the force F2 applied after the superplastic state of the amorphous alloy ends. The time is T2, where F2>1.2×F1, T2>0.3×T1.